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<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Hi Anne<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>I’ve just started learning perl, and found your
contact details here (<a href="http://www.pm.org/groups/522.html">http://www.pm.org/groups/522.html</a>)
while looking for community help. It seems a bit out of date, so please forgive
me if I’m knocking on the wrong door.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>I was exploring the “/x” regexp modifier, and
came upon some unexpected results. Upon closer inspection, my problem lies with
the ternary operator. I can’t see why the following results are
inconsistent ..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'1:'.( 'hello' =~ /h e l l o/
)?'true':'false'; # no '/x', no match<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'2:'.( 'hello' =~ /h e l l o/x
)?'true':'false'; # '/x' ignores spaces,
produces '1'<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'3:'.( 'h e l l o' =~ /h e l l o/x )?'true':'false'; # '/x' ignores
spaces, no match<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <span
style='background:yellow'>say '1:'.( 'hello' =~ /h e l l o/
).'.'; # no '/x', no match</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <span
style='background:yellow'>say '2:'.( 'hello' =~ /h e l l o/x
).'.'; # '/x' ignores spaces, produces '1'</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <span
style='background:yellow'>say '3:'.( 'h e l l o' =~ /h e l l o/x
).'.'; # '/x' ignores spaces, no match</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'1:'.( 'hello' =~ /h e l l o/ ) &&
'true.'; # no '/x', no match<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'2:'.( 'hello' =~ /h e l l o/x ) &&
'true.'; # '/x' ignores spaces, produces
'1'<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'3:'.( 'h e l l o' =~ /h e l l o/x ) && 'true.'; # '/x'
ignores spaces, no match<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <span
style='background:yellow'>say '1:'.(( 'hello' =~ /h e l l o/ ) + 0)
.'.'; # no '/x', no match</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <span
style='background:yellow'>say '2:'.(( 'hello' =~ /h e l l o/x ) + 0)
.'.'; # '/x' ignores spaces, produces '1'</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> <span
style='background:yellow'>say '3:'.(( 'h e l l o' =~ /h e l l o/x ) + 0)
.'.'; # '/x' ignores spaces, no match</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'1:'.(( 'hello' =~ /h e l l o/ ) +
0)?'true':'false'; # no '/x', no
match<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'2:'.(( 'hello' =~ /h e l l o/x ) +
0)?'true':'false'; # '/x' ignores spaces,
produces '1'<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'> say
'3:'.(( 'h e l l o' =~ /h e l l o/x ) + 0)?'true':'false'; # '/x'
ignores spaces, no match<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>.. where only the <span style='background:yellow'>highlighted
sections</span> above yield the expected results. All the others always return ‘true’.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>If you can’t help, then please point me in the right
direction for community support.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Many thanks and kind regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>DT<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
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